Full Freeview on the Hemel Hempstead (Hertfordshire, England) transmitter
 | Google map |  | Bing map |  | Google Earth |  | 51.729,-0.426 or 51°43'43"N 0°25'34"W |  | HP3 8SA |
The symbol shows the location of the Hemel Hempstead (Hertfordshire, England) transmitter which serves 74,000 homes. The bright green areas shown where the signal from this transmitter is strong, dark green areas are poorer signals. Those parts shown in yellow may have interference on the same frequency from other masts.
This transmitter has no current reported problems
The BBC and Digital UK report there are no faults or engineering work on the Hemel Hempstead (Hertfordshire, England) transmitter._______
Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
The Hemel Hempstead (Hertfordshire, England) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: .
If you want to watch these channels, your aerial must point to one of the 80 Full service Freeview transmitters. For more information see the will there ever be more services on the Freeview Light transmitters? page.
Which Freeview channels does the Hemel Hempstead transmitter broadcast?
If you have any kind of Freeview fault, follow this Freeview reset procedure first.Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
The Hemel Hempstead (Hertfordshire, England) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: .
If you want to watch these channels, your aerial must point to one of the 80 Full service Freeview transmitters. For more information see the will there ever be more services on the Freeview Light transmitters? page.
Which BBC and ITV regional news can I watch from the Hemel Hempstead transmitter?
BBC London 4.9m homes 18.4%
from London W1A 1AA, 30km southeast (138°)
to BBC London region - 55 masts.
ITV London News 4.9m homes 18.4%
from London WC1X 8XZ, 31km southeast (135°)
to ITV London region - 55 masts.
How will the Hemel Hempstead (Hertfordshire, England) transmission frequencies change over time?
| 1984-97 | 1997-98 | 1998-2012 | 2012-13 | 18 Apr 2018 | |||||
| B E T | B E T | B E T | E T | K T | |||||
| C29 | ArqB | ||||||||
| C31 | ArqA | ||||||||
| C34 | _local | ||||||||
| C37 | SDN | ||||||||
| C40 | BBCA | ||||||||
| C41 | ITVwaves | ITVwaves | ITVwaves | D3+4 | |||||
| C42 | _local | ||||||||
| C43 | D3+4 | ||||||||
| C44 | BBC2waves | BBC2waves | BBC2waves | BBCA | |||||
| C46 | BBCB | ||||||||
| C47 | C4waves | C4waves | C4waves | BBCB | |||||
| C50tv_off | SDN | ||||||||
| C51tv_off | BBC1waves | BBC1waves | BBC1waves | ||||||
| C55tv_off | ArqB | ||||||||
| C59tv_off | ArqA |
tv_off Being removed from Freeview (for 5G use) after November 2020 / June 2022 - more
Table shows multiplexes names see this article;
green background for transmission frequencies
Notes: + and - denote 166kHz offset; aerial group are shown as A B C/D E K W T
waves denotes analogue; digital switchover was 4 Apr 12 and 18 Apr 12.
How do the old analogue and currrent digital signal levels compare?
| Analogue 1-4 | 10kW | |
| SDN, ARQA, ARQB, BBCA, D3+4, BBCB | (-7dB) 2kW | |
| Mux 1*, Mux 2*, Mux A*, Mux B* | (-14dB) 400W | |
| Mux C*, Mux D* | (-17dB) 200W |
Local transmitter maps
Hemel Hempstead Freeview Hemel Hempstead DAB Crystal Palace TV region BBC London LondonWhich companies have run the Channel 3 services in the Crystal Palace transmitter area
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Friday, 23 December 2011
Peter Merritt: That is correct.
Before switchover transmission of HD services is not standard from transmitters which is why Hemel Hempstead's transmitter doesn't carry it.
Crystal Palace has a pre-switchover HD multiplex which is on lower power than the standard definition services.
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Wednesday, 11 January 2012
N
Nathalie10:20 AM
Watford
I live in North Watford and noticed last night that I couldn't get Mux C (Dave etc.). I could hear a clicking sound as though the channel is trying to get through but no image.
At the same time Mux A, which had disappeared for months, is now back.
Do you know what the problem could be?
Thanks.
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Nathalie's: mapN's Freeview map terrainN's terrain plot wavesN's frequency data N's Freeview Detailed Coverage
Tuesday, 17 January 2012
Wednesday, 18 January 2012
1:09 PM
Post Code HP169NA I have ongoing problems with television reception except via the satellite dish.All goes well for weeks and then problems occur. There is currently no freeview reception and the message on the respective sets is no signal check antenna / cable. How do I sort out this ongoing problem?
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J Metcalfe: Perhaps it is the inversion effect (follow the link for explanation). The predictor suggests that them multiplex that carries ITV1, C4, C5 and others is marginal.
You will probably have to live with it until switchover when the transmission power is boosted by 10 times.
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Saturday, 21 January 2012
P
PETER MERRITT9:28 PM
St. Albans
Recently changed from communial aerial to having an aerial fitted - the fitter who fitted the aerial said the signal was stronger from Hemel Hemstead than Crystal Palace - the aerial previous has always given us a good picture
the picture we now get wavers all the time and we have no HD
Will this improve
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PETER's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
Peter Merritt: What was the reason for having your own aerial fitted? Did you get HD with the communal aerial?
You won't get HD services from Hemel Hempstead until switchover on 18th April.
What is the "wavers" you describe? Is this digital television (Freeview)?
What are you using, i.e. set-top box, TV? If it's a set-top box, then how are you connecting it together?
Has this problem started since the new aerial was installed?
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Sunday, 22 January 2012
P
PETER MERRITT5:49 PM
St. Albans
We had our own aerial fitted because the co
mmunal aerial we were attatched to is to become redundant
the picture quality we had previously was better than now which constantly "twitches " and sometims goes off for a moment
the tv has built in Freeview
the aerial was fitted on the gutter face board by a local aerial specialist - thanks
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PETER's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
Monday, 23 January 2012
PETER MERRITT: Can you please see Freeview intermittent interference | ukfree.tv - independent free digital TV advice in the first instance?
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R
Ray McConnell12:19 PM
Hemel Hempstead Town digital switchover date | ukfree.tv - independent free digital TV advice shows a rather strange radiation pattern for hemel-hempstead after switchover but Hemel Hempstead digital switchover date | ukfree.tv - independent free digital TV advice shows a more useful pattern. Which one is correct ?
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